<?xml version='1.0' encoding='utf-8'?>
<?xml-model href="https://pds.nasa.gov/pds4/pds/v1/PDS4_PDS_1M00.sch" schematypens="http://purl.oclc.org/dsdl/schematron"?>
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      <Modification_Detail>
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      <Modification_Detail>
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        <description>Update references</description>
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      <Modification_Detail>
        <modification_date>2016-04-04</modification_date>
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        <description>Initial version exported from OLAF</description>
      </Modification_Detail>
    </Modification_History>
  </Identification_Area>
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    <Internal_Reference>
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    </Internal_Reference>
    <Internal_Reference>
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    <Internal_Reference>
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    </Internal_Reference>
    <Internal_Reference>
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    <Internal_Reference>
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    </Internal_Reference>
  </Reference_List>
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    <type>Observatory</type>
    <address>Steward Observatory
                                  Univ. of Arizona, Astronomy Dept.
                                  949 North Cherry Avenue
                                  Tucson, Arizona</address>
    <country>USA</country>
    <description>Mount Bigelow (Catalina) Station, located in Arizona, USA, is a key facility for space object tracking, particularly in support of the Catalina Sky Survey for near-Earth object detection.</description>
  </Facility>
</Product_Context>
